1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
4 */
5
6 #define pr_fmt(fmt)"[drm-dp] %s: " fmt, __func__
7
8 #include <linux/debugfs.h>
9 #include <drm/drm_connector.h>
10 #include <drm/drm_file.h>
11
12 #include "dp_catalog.h"
13 #include "dp_aux.h"
14 #include "dp_ctrl.h"
15 #include "dp_debug.h"
16 #include "dp_display.h"
17
18 #define DEBUG_NAME "msm_dp"
19
20 struct dp_debug_private {
21 struct dp_link *link;
22 struct dp_panel *panel;
23 struct drm_connector *connector;
24 };
25
dp_debug_show(struct seq_file * seq,void * p)26 static int dp_debug_show(struct seq_file *seq, void *p)
27 {
28 struct dp_debug_private *debug = seq->private;
29 u64 lclk = 0;
30 u32 link_params_rate;
31 const struct drm_display_mode *drm_mode;
32
33 if (!debug)
34 return -ENODEV;
35
36 drm_mode = &debug->panel->dp_mode.drm_mode;
37
38 seq_printf(seq, "\tname = %s\n", DEBUG_NAME);
39 seq_printf(seq, "\tdrm_dp_link\n\t\trate = %u\n",
40 debug->panel->link_info.rate);
41 seq_printf(seq, "\t\tnum_lanes = %u\n",
42 debug->panel->link_info.num_lanes);
43 seq_printf(seq, "\t\tcapabilities = %lu\n",
44 debug->panel->link_info.capabilities);
45 seq_printf(seq, "\tdp_panel_info:\n\t\tactive = %dx%d\n",
46 drm_mode->hdisplay,
47 drm_mode->vdisplay);
48 seq_printf(seq, "\t\tback_porch = %dx%d\n",
49 drm_mode->htotal - drm_mode->hsync_end,
50 drm_mode->vtotal - drm_mode->vsync_end);
51 seq_printf(seq, "\t\tfront_porch = %dx%d\n",
52 drm_mode->hsync_start - drm_mode->hdisplay,
53 drm_mode->vsync_start - drm_mode->vdisplay);
54 seq_printf(seq, "\t\tsync_width = %dx%d\n",
55 drm_mode->hsync_end - drm_mode->hsync_start,
56 drm_mode->vsync_end - drm_mode->vsync_start);
57 seq_printf(seq, "\t\tactive_low = %dx%d\n",
58 debug->panel->dp_mode.h_active_low,
59 debug->panel->dp_mode.v_active_low);
60 seq_printf(seq, "\t\th_skew = %d\n",
61 drm_mode->hskew);
62 seq_printf(seq, "\t\trefresh rate = %d\n",
63 drm_mode_vrefresh(drm_mode));
64 seq_printf(seq, "\t\tpixel clock khz = %d\n",
65 drm_mode->clock);
66 seq_printf(seq, "\t\tbpp = %d\n",
67 debug->panel->dp_mode.bpp);
68
69 /* Link Information */
70 seq_printf(seq, "\tdp_link:\n\t\ttest_requested = %d\n",
71 debug->link->sink_request);
72 seq_printf(seq, "\t\tnum_lanes = %d\n",
73 debug->link->link_params.num_lanes);
74 link_params_rate = debug->link->link_params.rate;
75 seq_printf(seq, "\t\tbw_code = %d\n",
76 drm_dp_link_rate_to_bw_code(link_params_rate));
77 lclk = debug->link->link_params.rate * 1000;
78 seq_printf(seq, "\t\tlclk = %lld\n", lclk);
79 seq_printf(seq, "\t\tv_level = %d\n",
80 debug->link->phy_params.v_level);
81 seq_printf(seq, "\t\tp_level = %d\n",
82 debug->link->phy_params.p_level);
83
84 return 0;
85 }
86 DEFINE_SHOW_ATTRIBUTE(dp_debug);
87
dp_test_data_show(struct seq_file * m,void * data)88 static int dp_test_data_show(struct seq_file *m, void *data)
89 {
90 const struct dp_debug_private *debug = m->private;
91 const struct drm_connector *connector = debug->connector;
92 u32 bpc;
93
94 if (connector->status == connector_status_connected) {
95 bpc = debug->link->test_video.test_bit_depth;
96 seq_printf(m, "hdisplay: %d\n",
97 debug->link->test_video.test_h_width);
98 seq_printf(m, "vdisplay: %d\n",
99 debug->link->test_video.test_v_height);
100 seq_printf(m, "bpc: %u\n",
101 dp_link_bit_depth_to_bpp(bpc) / 3);
102 } else {
103 seq_puts(m, "0");
104 }
105
106 return 0;
107 }
108 DEFINE_SHOW_ATTRIBUTE(dp_test_data);
109
dp_test_type_show(struct seq_file * m,void * data)110 static int dp_test_type_show(struct seq_file *m, void *data)
111 {
112 const struct dp_debug_private *debug = m->private;
113 const struct drm_connector *connector = debug->connector;
114
115 if (connector->status == connector_status_connected)
116 seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);
117 else
118 seq_puts(m, "0");
119
120 return 0;
121 }
122 DEFINE_SHOW_ATTRIBUTE(dp_test_type);
123
dp_test_active_write(struct file * file,const char __user * ubuf,size_t len,loff_t * offp)124 static ssize_t dp_test_active_write(struct file *file,
125 const char __user *ubuf,
126 size_t len, loff_t *offp)
127 {
128 char *input_buffer;
129 int status = 0;
130 const struct dp_debug_private *debug;
131 const struct drm_connector *connector;
132 int val = 0;
133
134 debug = ((struct seq_file *)file->private_data)->private;
135 connector = debug->connector;
136
137 if (len == 0)
138 return 0;
139
140 input_buffer = memdup_user_nul(ubuf, len);
141 if (IS_ERR(input_buffer))
142 return PTR_ERR(input_buffer);
143
144 DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
145
146 if (connector->status == connector_status_connected) {
147 status = kstrtoint(input_buffer, 10, &val);
148 if (status < 0) {
149 kfree(input_buffer);
150 return status;
151 }
152 DRM_DEBUG_DRIVER("Got %d for test active\n", val);
153 /* To prevent erroneous activation of the compliance
154 * testing code, only accept an actual value of 1 here
155 */
156 if (val == 1)
157 debug->panel->video_test = true;
158 else
159 debug->panel->video_test = false;
160 }
161 kfree(input_buffer);
162
163 *offp += len;
164 return len;
165 }
166
dp_test_active_show(struct seq_file * m,void * data)167 static int dp_test_active_show(struct seq_file *m, void *data)
168 {
169 struct dp_debug_private *debug = m->private;
170 struct drm_connector *connector = debug->connector;
171
172 if (connector->status == connector_status_connected) {
173 if (debug->panel->video_test)
174 seq_puts(m, "1");
175 else
176 seq_puts(m, "0");
177 } else {
178 seq_puts(m, "0");
179 }
180
181 return 0;
182 }
183
dp_test_active_open(struct inode * inode,struct file * file)184 static int dp_test_active_open(struct inode *inode,
185 struct file *file)
186 {
187 return single_open(file, dp_test_active_show,
188 inode->i_private);
189 }
190
191 static const struct file_operations test_active_fops = {
192 .owner = THIS_MODULE,
193 .open = dp_test_active_open,
194 .read = seq_read,
195 .llseek = seq_lseek,
196 .release = single_release,
197 .write = dp_test_active_write
198 };
199
dp_debug_init(struct device * dev,struct dp_panel * panel,struct dp_link * link,struct drm_connector * connector,struct dentry * root,bool is_edp)200 int dp_debug_init(struct device *dev, struct dp_panel *panel,
201 struct dp_link *link,
202 struct drm_connector *connector,
203 struct dentry *root, bool is_edp)
204 {
205 struct dp_debug_private *debug;
206
207 if (!dev || !panel || !link) {
208 DRM_ERROR("invalid input\n");
209 return -EINVAL;
210 }
211
212 debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL);
213 if (!debug)
214 return -ENOMEM;
215
216 debug->link = link;
217 debug->panel = panel;
218
219 debugfs_create_file("dp_debug", 0444, root,
220 debug, &dp_debug_fops);
221
222 if (!is_edp) {
223 debugfs_create_file("msm_dp_test_active", 0444,
224 root,
225 debug, &test_active_fops);
226
227 debugfs_create_file("msm_dp_test_data", 0444,
228 root,
229 debug, &dp_test_data_fops);
230
231 debugfs_create_file("msm_dp_test_type", 0444,
232 root,
233 debug, &dp_test_type_fops);
234 }
235
236 return 0;
237 }
238